Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1e0366327ac751…

MALICIOUS

PDF

84.2 KB Created: 2020-11-20 12:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8f88de55faaf72e723895474fa711066 SHA-1: bb7907425f3edee3b2d1b1ad401481925849a51b SHA-256: cf1e0366327ac751c6dedc10e33dd3048dca8aa729fddb7148456e116c9abe67
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/123?utm_term=jet+pro+x+male+enhancement+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_5f9ae8d6177ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_5faef71197354.pdfIn PDF document text
    • https://xezorilim.weebly.com/uploads/1/3/4/5/134588859/gagaduzunojosagibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5fb7379439880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5f8deb67b53ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fa84ba1ce662.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d78312b-9ebc-452a-8781-5353fda9fff7/goxabaxuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29a44e1-e090-4835-87af-9e8f44b40c94/99015835454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1369fbb0-fdfd-4b37-b815-7e8e51497154/zutasimaxojitukubop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e13ae8b-ff02-4f5e-a372-e903df13f64b/bogaxawabowini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dbf99a-493c-4a11-8b74-65312f218dde/pomp_and_circumstance_graduation_mar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be05b015-bac1-426f-b008-20c1a48f99ca/the_wallflowers_one_headlight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ecb4e9-ce4e-40f2-928b-a9d68f88e86f/zolatigexesujamavuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996b459f-d88c-4a39-b5ff-6c19b23c0f5e/lefesamirixinareg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14845719-c67f-404e-9c58-2d0cdfce1fee/lotodigukuvik.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE93 5380 bytes
SHA-256: dcbf61c82128ce2babc87194ecf2f4fb355e2e15d34e8d25b55e47d301b75885
font_01_sfnt_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 8472 bytes
SHA-256: 3d8ad5f6ff55d4e8e3f5b7715d3e29c203d72ae5e4e3c551dca4604f848612c8
font_02_sfnt_off0000fda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA4 10548 bytes
SHA-256: 23e7d441a5c8d11932e56526d20a388e01760a17ebb2dd04b5ff7a7e8261bcda
font_03_sfnt_off000121de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DE 16844 bytes
SHA-256: d49173c7c8f4d3200d9ee729160cd80e12c609125daeed64881bba96f25f394f
font_04_sfnt_off00013990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13990 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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